The Ceiling Grid Vent System is designed to aggressively vent air from equipment rooms or closets. The unit easily installs in a standard 2′ x 2′ ceiling grid and uses nine professional-grade 120mm DC fans to aggressively, but quietly, vent up to an impressive 575 CFM of air. The fans are automated by using two independent temperature controllers with the first turning on one bank of fans at 80F and the second controller turning the remaining fans on at 88F. This means that the fans only run when necessary which saves energy and increases the life of the system.